Custom S V G Scatter Points

MyGeometry.cs

using LiveChartsCore.Drawing;
using LiveChartsCore.SkiaSharpView.Drawing;

namespace ViewModelsSamples.Scatter.Custom;

public class MyGeometry : BoundedDrawnGeometry, IDrawnElement<SkiaSharpDrawingContext>
{
    public void Draw(SkiaSharpDrawingContext context)
    {
        var paint = context.ActiveSkiaPaint;
        var canvas = context.Canvas;
        var y = Y;

        while (y < Y + Height)
        {
            canvas.DrawLine(X, y, X + Width, y, paint);
            y += 10;
        }
    }
}

Razor

@page "/Scatter/Custom"
@using LiveChartsCore.SkiaSharpView.Blazor
@using LiveChartsCore.SkiaSharpView
@using LiveChartsCore
@using LiveChartsCore.Defaults
@using LiveChartsCore.SkiaSharpView.Drawing.Geometries
@using LiveChartsCore.Drawing
@using ViewModelsSamples.Scatter.Custom

<CartesianChart
	Series="Series">
</CartesianChart>

@code {
    private ISeries[] Series { get; set; }

    protected override void OnInitialized()
    {
        var values1 = Fetch();
        var values2 = Fetch();
        var values3 = Fetch();
        var pinPath = SVGPoints.Pin;

        Series = new ISeries[]
        {
            // the second type argument is the geometry to draw.
            new ScatterSeries<ObservablePoint, HeartGeometry>
            {
                Values = values1,
                Stroke = null,
                GeometrySize = 40
            },

            // the variable SVG path geometry can change the path at runtime.
            new ScatterSeries<ObservablePoint, VariableSVGPathGeometry>
            {
                Values = values2,
                GeometrySvg = pinPath,
                GeometrySize = 40
            },

            // finally you can use skiasharp to draw your own geometries.
            new ScatterSeries<ObservablePoint, MyGeometry>
            {
                Values = values3,
                GeometrySize = 40
            }
        };
    }

    private static ObservablePoint[] Fetch()
    {
        var r = new Random();
        var length = 10;
        var values = new ObservablePoint[length];
        for (var i = 0; i < length; i++)
        {
            var x = r.Next(0, 20);
            var y = r.Next(0, 20);
            values[i] = new ObservablePoint(x, y);
        }
        return values;
    }
}

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